Here's the formal specification for the until loop:



until condition [ do | : ]
  code
end

1.	until keeps looping while its condition remains false, or not true.
2.	As unless is a negated form of if, until is really a negated form of while.
3.	like while, you have another form you can use with untila€¡±that is, with begin/end:
4.	until loops until a certain condition is met
5.	unless and until

Here's the formal specification for the until loop: : until « Statement « Ruby